Marine propulsion mechanism.



0. `BVINRUDE. MARINE PRoPULsIoN MEGHANISM.

APPLICATION -IILBD 00T. 12, 1912. 1 ,087,162, Patented Feb. 17, 1914.

UNITED sTATEs PATENT oEEicE.

om: 'vmnu'inn or itiLwAUxEE, wisconsin, Assieivon To Evmnuim m'o'roneo.,

or MILWAUKEE, WISCONSIN.

immun iior'iins'ioir nnciiainsiu.

iipiidauon ined beater i2, 1912. serial no. 725,858.

To all whom it may concern Be it known` that 1 OLE EVINRUDE, a citiz'eiiof the United States,and resident` of Milwaukee inthe county ofMilwaukee State of Wisconsin, have invented certain 'new and usefulImprovements arine Propulsion Mechanism; and I do hereby declar that thefollowing is a full, clear, and

exact descriptionthereof. j

My invention consists in what is herein particularly set forth withreference tothe accompanying drawin s and pointed outin the claims ofthis specication, its main object being to provide for readycompensation for wear caused by end-thrust of propellershafts andgear-thrust thereon, especially in the marine propulsion mechanismdisclosed in United States Letters Patent No. 1,001,260,

are correspondingly granted ugust 22, 1911. ,V

Figure 1 of the drawings representsywa partly sectional side elevationof marine propulsion mechanism similar to that disclosed in the LettersPatent aforesaid and embodying the improvements herein specified; Fig.2, a central longitudinal sectional view of an adjustable bushingconstituting a novel essential part of said mechanism, and Fig.v3, across-section ofthe bushing indicated by line 3-3 in Fig. 2.

Referring by numerals and letters to' the drawings, 25 indicates a lowersliding section of a vertical engine-shaft, 15 a stationary tubeconcentric with the shaft, 16- another tube adjustable on-the oneaforesaid, 17 a gear-case having a shaft-bearing extension 17 thereofupon which the lower end of the tube 16 is detachably secured, 26 apropeller, 26 the propeller-shaft in I nitergear connection with saidsliding section of the engine-shaft, 27 apump-cylinder, 28 a hoseleading from the puinp-cylinder and 29 the pump-piston operated by a cam30 on tileflub -of the gear-wheel of said propellers a The generalconstruction and arrangement of parts to which reference is had in theforegoing is similar to what is disclosed in the Letters Patent abovenoted, and they indicated. Like in said Letters Patent, the tube 16 isprovided with a ri id outer collar 18 adjustable longitudin ly of avsupporting bracket arm 13 but this detail constitutes no part of whatis herein claimed, and is only incidentally shown.

`series of apertures 0 VThe essential novel feature of what is hereinclaimed is an adjustable bushing B in the forward horizontal bearing-boxexid of the 'gear-,case 17, the bushing being arrangev to -have its rim'at one end in contact with a shoulder fast on a driven-shaft to' thusr'esist gear-thrust `on the shaft, and it is 'preferab e to provide saidgear-case witha depeilding. guard-iin F in advance 'of the proe er.

The bushing B is externally screw-threaded and closed at its excludewater from the gear-case, this end being preferably cone-pointed andprovided with a kerfb wi h which to engagea turning tool such as ascrew-driver,.bu`t without departure from my invention as .hereinclaimed, the closed outer end of said bushing may be otherwise adaptedfor engagement with a turning-tool. The bore of the foi'- wardbearing-box end of the gear-case is screw-threaded to match the threadof the bushing, and said bushing is set to have its inner end inopposition to the hub of the propeller-shaft gear-wheel that constitutesa wear-.shoulder on said shaft, it being held in adjusted position by aset-screw S with which the gear-case is provided. The propeller-shafthas end clearance in the bushing, and said bushing is provided with a atpredetermined regular intervals spirally of its circumference, these'apertures being for the engagement of the set-screw S in serial orderbeginning with the one aftermost. However other means may be employedfor securing the bushing in rotary adjusted position without departurefrom my invention as herein claimed.

Y Coincidental to end-thrust of the propeller-shaft there is wear of therim of the after end of the bushing and incidental to gear-thrust onsaid shaft there is also wear upon the underlying portion of said bush?ing. To take up said wear, the set-screw 'S is loosened and the bushingis` adjusted aft Vin the gear-case ter turn of the bushing in the properdirection will suiiice to compensate for the aforesaid wear, and hencethe apertures in said bushing for engagement serially of the set-- screwS may be at quarter intervals'ofa circle as herein` shown, or they maybe at eater or less intervals apart.

The bushing takes the wear that would Patented Feb; it; ia'ia; I

forward end tothereby from time to time. A quarv otherwise come upon thegear-ease, making it necessary to renew the same from time to time, atno greater expense than is involved inthe substitution of a new for aworn bushing. The bushing also renders hardening of the forward bearin-boX end of the gear-case unnecessary, an said bushing is ofwear-resistingmaterial in order to prolong its utility.

I claim:`

l. In a marine propulsion mechanism, a gear-case, a bushinglongitudinally adjustable in the forward bearing-box end of thegear-case and having a closed forward end adapted forengagement with anadjustingtool, a propeller-shaft having an end thereof in the bushing,and a wear-shoulder on the shaft opposing the rimof the after end ofsaid bushing uponwhich it has thrust. f

2. In a marine propulsion mechanism, a' gear-case, a bushinglongitudinally and rotatably adjustable in the forward bearing-box endof the gear-case and having a closed forward end adapted for engagementwith an adjusting-tool, a propeller-shaft having an end thereof in thebushing, and a wearshouldei' on the shaft opposing the rim of the afterend of said bushing upon which il; has thrust, the longitudinaladjustment off the bushing serving to compensate for the wear of saidend thereof and its rotary adjustment serving to compensate for weartherein under said shaft upon which gearethrust is exerted.

3.` In a marine pn pulsion mechanism, gear-case, a propeller-shaft, abushing longitudinally and rotatably adjustable in the forwardbearing-box end of the gear-case and having a closed forward end adaptedfor engagement with a turning-tool, the after rim-end of the bushingbeing in contact with a shaft-shoulder to resist gear-thrust on saidshaft, and means foi` securing the bushing in its adjusted position.

In a marine propulsion mechanism, a gear-case, a propeller-shaft, abushing in screw-thread enga ement with the forward bearing-box end othe gear-case for aft adjustment to compensate for Wear occasioned byend-thrust of said shaft and gear-thrust thereon, the bushing beingprovided with apertures at intervals spirally of its circumference, anda set-screw with said gear-case for engagement of the bushing aperturesin serial order.

5. In a marine propulsion mechanism, a gear-case, a propeller-shaft, abushing in screw-thread engagement with the forward bearing-box end ofthe gear-case and having a closed cone-pointed end provided with a kerfin which to engage a turning-tool, and means for securing the bushing inadjusted position.

In testimony that I claim the foregoing I have hereunto set my hand atMilwaukee in the county of Milwaukee and State of Wiscousin in thepresence of two witnesses.

OLE EVINRUDE.

Witnesses:

N. E. LIPHANT, M. DOWNEY.

